郧西县神雾岭茶场是郧阳地区主要大茶场之一,建于1971年,现有茶园面积800亩,其中可采摘的面积410亩,但年产茶叶只有5000公斤左右,平均亩产15～20公斤。该场茶叶连年低产主要原因,就是由于在生长季节茶树大量感病的缘故。据我们于5月上、中旬春茶采摘时期调查,仅老叶和成叶染病率就达60～70%,甚至有部分茶丛因病严重而全 Yunxi County Shenwuling Chachang is one of the major tea farms in Yunyang area. Built in 1971, the existing tea garden covers an area of ​​800 mu, of which 410 mu can be picked, but with an annual output of only 5000 kg of tea, the average yield per mu 15 ~ 20 kg. The main reason for the low yield of tea in successive years is due to the large number of tea trees in the growing season. According to our investigation in mid-May and mid-spring picking period, only the incidence of old leaves and fallen leaves reached 60 ~ 70%, and even some of the tea leaves were severely affected by the disease